Mold for concrete



R. T. WALES.

IV IOLD FOR CONCRETE. APPLICATION FILED DEC-19, 1919.

Patnted Oct. 5, 1920.

2 SHEETS-SHEET 1.

R. T. WALES. MOLD FOR CONCRETE. APPLICATION FILED DEC. 19,4919.1,354,705. Patented 001:. 5,1920.

2 SHEETS-SHEET Mm f VENTOR Y M M B Aziorne s,

UNITED STATES PATENT OFFICE.

ROWLAND T. WALES, OF NERV RQCI'IELLE, NEW YORK..

MOLD FOR CONCRETE.

1919. Serial To all whom it may concern:

Be it known that I, ROWLAND T. lVALns, a citizen of the United States ofAmerica, formerly residing in Sewaren, in the county of Middlesex andState of New Jersey, but now of New Rochelle, WVestchester county, Stateof New York, have invented certain new and useful Improvements in Moldsfor Concrete of which the following is a speci fication.

This invention provides certain improvements in molds for use inbuilding structures of concrete or similar material, or for facing orcovering structures with such material. The particularconstruction ofmolds to which these improvements apply embodies the following. Thefacing plates comprise panels of wood or of sheet metal against whichthe concrete or similar mate rial is molded. They may be simple boardsor channels of sheet metal. The facing plates are called plates herein.They are supported by a framework comprising a series of supportsdisposed adjacent the mold space and preferably having flanges extendinglaterally from them and also ad jacent the mold space. The plates areheld in position by means of locks which engage the supports. Thesupports maybe disposed vertically horizontally or inclined, tocorrespond with the face of the mold desired. Likewise they may beeither straight or curved, a curved support being adapted for the insideof sewer or subway construction. The relative positions of plates, locksand supports will be substantially the same for different kinds of work.In wall forms the supports are also known as studs. in ceiling formsthey are also known as joists. The supports may be secured and held inposition by any usual or suitable method for securing and holding suchmembers. An advantageous means is shown herein which comprises animproved kind of stringer. The plates are adjustable and movablerelatively to the supports and adjustable into and out of positionwithout affecting them. Plates are likewise adjustable and movablewithout affecting adjacent plates except in special cases. Each lock maybe adjustable relatively to both plates and supports and without movingsupports, other locks or other plates than the plate or plates immediately held by it. Such construction permits using the same plates and.locks rt Specification of Letters Patent.

Patented Oct. 5, 1920.

Continuation of application Serial No. 153,559, filed March '9, 1917.This application filed December 19,

peatedly in different parts of the same framework of supports before ajob is completed. t also permits taking down the supports afterstripping of plates and using the same supports again in another part ofthe job. While two supports are in any one upright position, a plate canbe used between them repeatedly at subsequently higher levels eachremoval of the plate being made after the concrete behind it has becomehard enough to stand up in the small area which the plate covered. Thecon struction of molds described in the foregoing has the followingadvantages over other kinds of molds:

1. Uses less mold material on a single job.

2. Uses the same mold material repeatedly and without destruction onsuccessive jobs.

3. Is erected and dismantled quicker and with less labor.

4. Permits easy placing and supporting of any iron reinforcement withinthe mold space before the plates are locked in position.

5. Possesses all advantages of panel molds without sacrificing thestrength and accuracy possible by using studs or joists as in otherkinds of molds.

This invention provides certain new and useful improvements pertainingto the construction described in the foregoing and has made it morepractical. Some of the objects accomplished by these improvements aregiven in the following:

1. Improved method of engaging the supports by the locks, permittingmaximum strength of both locks and supports with minimum size and weightof both. An improved shape ofboth support and lock to correspond withthe improved method of engagement.

2. Improved splice for connecting supports end to end or for slightlyincreasing the length of a support.

Improved stringers and means for securing them to the supports.

' l. improved means for splicing stringers end to end.

5. Improved facing plate of sheet metal having an improved and simplemeans of forming its ends and stiffenin them without obstructing itsmold face or its sides, and for adapting its ends to bear withsubstantial force against bars withow'nt collapsin tion.

7 where they meet.

6. Improved accessories for molding corners of walls in combination withthe type of mold described herein and with minimum labor and waste ofmold material.

In the accompanying drawings,

Figure 1 is a partial vertical sectional view on line 1 of Fig. 3.Everything in'the back ground relative tothe support is omitsection.

Fig. 3 is a general view showing parts assembled to form two walls and acorner It is a horizontal see- I tional view at the level of line 3 ofFig. 1.

Only the parts of the locks whichextend from the lateral sides of thestuds'are shown. Their parts within the studs are removed from this viewto avoid confusion with construction there shown. I

Fig. 4; shows a detail; It is a vertical section through an end stringerat either line i or line (4) of Fig. 3, and omits from view everythingexcept the end stringer.

.-Fi.g. 5 is a view similar to Fig. 2. It shows a method of fasteningthe opposite lateral sides of a support together. It also shows howplates may consist of boards instead of panels and be held in positionby -a flanged bar between them and the locks.

. Fig. 6 shows an enlarged detail looking toward the upper part of Fig.1 as the arrow -marked 6 and shows a splice for connecting Fig. 10 is aview illustrating two details, 7

it being a vertical sectional view on line 12 of Fig. 3.

Flg. 11 shows a facing'pla te of sheet metal in vertical section atabout line 13 of Fig. 12, omitting from view the flanged barM at theleft of Fig. 12.

Fig. 12 is a horizontal sectional View through Fig. 11 and shows also aflanged bar ll/l'adjacent the end at the left of the .view', and flangeF.

part of a support having a In the accompanying drawings, in Figs. 1, 2,3, 5,. 6 and 7, there are shown supports each having lateral sides R,flanges F adjacent the mold space, a side J on the side opposite themold space and a side formed by the wood part A adjacent the mold space.The parts R, F and J are shown formed of one piece of sheet metal bentinto the desired shape, a channel bar in the present illustration. Thelateral sides R are shown connected adjacent the open side of thechannel bar by stove bolts G screwed into a tapped tube D. detail ofthis is shown in enlarged section in Fig. 9. There areseveral-fastenings like ((1 D) distributed longitudinally of eachsupport as indicated by the screws C in Fig. 1. The holes in the lateralsides R which receive the bolts C are shown countersunk by a punch inFigs. 5 and 9. This permits the heads of the stove bolts C to bedisposed'flush ,or below the surfaces of the lateral sides R. Themembers P of the locks are shown en a in the sunnorts and extendinglaterally from them through openings U in the lateral sides R. In Fig.1, the positions of the openings U which are out of view from theobserver'and are through the opposite lateral side of the sup port fromthe side shown are indicated by dotted lines and shown to be atdifferent levels from those th'roughthe lateral side which is in view inthis figure. With the holes ll distributed in this manner the locksextending through opposite lateral sides of the support cannot obstructeach other. T

Fig. 1 a plate K, comprising vtliour boards, is shown held in positionadjacent the mold space and adjacent a flange F of the support. Part ofanother plate K is shown directly below. Locks (P C2) are shownholding'the plates. In Fig. 2 .is shown a transverse section through thesame construction. It shows how a lock (P Q) is held engaged with thesupport and how its screw member holds the plate K in position adjacentboth the flange F and the mold space. This screw Q; may be turned by anail which may be inserted into one of the holes shown in Q near itsoutward end from the moldspace. These holes are preferably drilled atright angles to each other as shown. lVith this means of turning Q,

g a nail or pin may be used clear and free from obstruction by R or P.The channel shape G screwed to the boards of the plate K holds themtogether and reinforces their ends. Pressure between G andQ obviouslyprevents P being moved out of engagement with the support. The screw Q,is movable relatively to P toward and from the mold space. To disengagethe lock from the support, Q is turned so that it moves relatively to Pa suflicient amount to permit the outer end of P from the mold space tobe moved laterally of the support sufficiently to emerge from the holeU. This position of P is indicated by dotted lines in Fig. 2. From thisposition P can then be moved outwardly of the mold space sufiiciently todisengage its end which is nearest the mold space. The member P ispreferably a casting. These locks are comparatively small, compact andcheap and have great strength. They are simple, easy to operate and manof them can be conveniently placed in a pail, thereby facilitating theirtransportation. from place to place on the job, and their collection andpreservation when the form is being taken down.v

The member P is shown bearing laterally against the inside of a lateralside R of the support at a point nearer to the mold space than the partof P at its entrance to the opening U through the same lateral side Thelock is thus prevented moving laterally from the support past the end ofthe plate K. The member P near its end nearest the mold space is shownwide enough to extend substantially between the two lat eral sides Rwhich are thus adapted to prevent the lock moving laterally of the studin either direction. The outer end of P from the mold space is shownbearing outwardly of the mold space and against the inside of thesupport. side opposite from the mold space. The outer part of P from themold space is also shown bearing laterally of the support and againstthe inside of the lateral side R- opposite from the side B through whichP extends. This prevents the outer end of P from moving laterally of thesupport when pressure is applied on Q.

In Figs. 1, 3 and 6, V are tie rods for connecting supports on oppositesides of a wall or for otherwise holding them in position. In Fig. 6, Vis shown in section and disposed in a hole through the support.

In Figs. 1 and 3, W are pipes encircling V and partly broken from view.They are sometimes used in the manner shown for the purpose of holdingopposite sides of the mold properly spaced apart. X in Fig. 8 are stickssometimes used for the same purpose. One is shown tied by wire to V andthe other held in position by nails. L in Figs. 1 and 3 are the bodyparts of rod clamps adapted to act as nuts on unthreaded rods.

The channel bar H, in Figs. 1, 6 and 7 is the body part of a splice forconnecting two supports end to end or for slightly increasing the lengthof a single support. This body part is shown fitted about three sides ofa support and secured to it by bolts S having eccentric heads engagingthe side of slots S in the back of the support. The eccentric heads ofthe bolts S are each shown of greater length than width. The slots S areout of view in Fig. 6 but are indicated by dotted lines. The heads ofthe two lower bolts S in Fig. 6 are indicated by dotted lines extendingat right angles to the slots S. WVhile the heads S are being inserted orremoved from the support, they must be turned parallel to the slots S.The nuts on S may remain at all times thereon and S remain at all timesconnected with H. It is only necessary to tighten or loosen the nutswhen connecting H to a support or removing it therefrom. While the headsof the bolts S are in engagement with a support, they may be preventedfrom turning by nails or pins T shown. disposed through small slets inthe sides of the support and of H. These nails or pins may if desired bereplaced by wire. H is shown reversible end for end and is obviouslyadapted to connect either end of another support with either end or theone shown, because the supports are also designed to be reversible endfor end. Since H, when connected with a support, prevents the engagementof locks therewith, bars N are shown riveted to the laterally extendinganges B of H and carry screws Q for the same purpose as screws Q of thelocks. The holes in N which receive the rivets O are countersunk asshown in dotted lines. Q and N on one side of H are shown dispesed at adifferent distance from the same end of H, from that of the parts Q andN on the opposite side of H. Their positions correspond as nearly aspractical with the distribution of the holes U on opposite sides of thesupports. While H is secured in position and the screws Q, have beenmoved sutfiriently outward of the mold, there is sutficient room betweenN and F or B and F to allow moving plates longitudinally of the supportuntil past the ends of H.

.Y in Figs. 1, 3 and 8 is a stringer adapted for holding supports atproper intervals apart. End or splicing stringers Y are also shown inFigs. 1 and 8. Another inside stringer a is shown in Fig. 3. Thestringers Y, Z, a, are secured to the supports by bolts (Id. The part qis a short channel shaped piece riveted to Y and furnishing a bearingsurface for the nut on a bolt cl. Each bolt (Z has an eccentric headwhich is longer than wide. It is adapted to engage slots in the back ofa support in the same manner as the bolts S already described and itshead is prevented from turning by a nail or pin disposed through smallslots in the lateral sides R of the support. In Fig. 1 and at two placesin Fig. 3 is an end stringer Z adapted to be spliced to the end of astringer Y and secured to a support near an end or corner of a mold. Itis also adapted for securing tie rods longitudinally of it asillustrated by u and 10 It is also adapted for securing such rods sothat they are adjustable longitudinally of it. For this, the endtransverse face or shoulder through which 7 the tie rod passes, andagainst which bears a clamp secured to the rod. This is illustrated by 1on the left side of Fig. 3. The part 1' is a short piece of sheet metalbent and perforated desired and is shown riveted to Z. It furnishes abearing surface for the nut L on d and has an opening for admitting atie rod u or other tension member. I prefer two holes 8 which are onlyvisible in Fig. 4 but the part of 1 through which they pass is shown inFig. 3 where Z and r are partly broken from View. This part of 7 alsofurnishes a bearing surface for either a nut or a rod clamp secured to atie rod disposed longitudinally of Z and through one of the holes .9 andas illustrated in Fig. 3 at the end of L which is secured to the rod u.In Figs. 3 and 10, a is a corner stringer adapted to be spliced to theend of a stringer Y and secured to a support at the inside corner of amold. Stringer a has a plate I? attached at its end. Both parts a and tare channel shaped and are shown riveted together. The part If furnishesa bearing surface for the nut on d. It also has holes for admitting tierods disposed transversely of it. The rods u and u are disposed in suchholes. The rods u and u are disposed in corresponding holes through botha and t. The holes through a and 2, through which 16 and u are disposedare preferably slots extending longitudinally to allow for variation inthe horizontal alinement of u and u. The positions of the rods u and ashow that t(he poles must be near the upper side of It is desirable alsoto have similar holes disposed near the lower side of (a t) for use when(a t) is used in a position reversed to that shown. The tension of therod 24 is shown transmitted to the line of stringers Z Y inside thecorner, by the corner stringer a, the rod 14 and the clamp L on u. u isdisposed substantially in horizontal alinement with this line ofstringers on the opposite side of the wall from o. This is true becauseu and u are sufficiently close together transversely of their length toadapt u to transmit tension to said line of stringers and longitudinallyof them.

The hook shape of one end of u is shown encircled by wire to prevent itbending open. For a similar purpose wire is shown tied around the rod uat its hook.

In Figs. 3 and 8, Z) is a channel shaped head longer than wide andadapted to engage slots in the stringers as shown. These 'bolts mayremain permanently connected to the splice 6 and their nuts are onlytightened or loosened as required. Before passing the heads of bolts 6through the slots it they are turned parallel to the slots. The heads ofe have holes through them. The flanges of the splice and the adjacentsides of the stringers have holes corresponding to the holes through theheads of e. N ails or pins 9 are shown disposed through all thesecorresponding holes and prevent the heads of e turning parallel to theslots H when .in engagement with the stringers. ire may be used insteadof pins. The webs of the stringers at their ends are shown reinforced byplates 2' fastened inside the stringers by rivets The heads of theserivets f on the sides of the stringers adjacent the splice and appearingonly in Fig. 3, do not collide with the splice 7) because holessufficiently large to clear them pass through 6. The positions of theseclearance holes in b are indicated in Fig. 8 by dotted circles around 7.

In Fig. '3 at the corner of the mold L is illustrated a means formolding iusugi and outside corners with minimum loss o mold material andminimum labor. it permits using the same ribs 20 and w and the sameboards K and K repeatedly and on walls of different thicknesses anddifferent lengths and in combination with the entire mold shown herein.

In the plates shown at the outside faces of the corner of the mold manyof the boards K may remain permanently nailed to 'w and 10. To vary thewidth of these outside plates, it is only necessary to add or removeboards at the edges'of the plates which are toward or at the corner ofthe mold space where the board K is shown. The ribs w, w and r0 aredisposed substantially horizontial. The rice to and w" have surpluslength extending beyond the corner of the mold and beyond 0. Above andbelow each rib 10, w and Q02 are other ribs like it and not appearing inthe figure. The boards K are each disposed vertically. The inside cornerplate has at one face of the corner a vertically extending timber mwhich is preferably secured to each rib by a lag screw w. esidesproviding a part ofthe mold space, 0 also acts as a stud and receivesthe lateral strain of the ribs 10 it thus prevents each rib 10concentrating its pressure against the lateral side R of the adjacentregular stud. This is advantageous because the adjacent regular stud isnot adapted to receive great pressures laterally at any point exceptnear the levels of the stringers which hold the regular stud inposition.

The ribs w and 10 are connected by tie rodsV and rod clamps 0 and pwhich are adjustible on V at different distances from the mold space.The ribs w and 'w where they extend beyond the outside corner of themold space are held in position by the upr1ght metal stay o winch isnisposed outwardly of them from the corner of the mold space. This stay41 is shown sec red to strin ers Z and Y b tie rods a and i. J

together with rodclainps p and L which adapt the rods to hold the stay cin different positions relative horizontally to the nearest supports. Atits lert end the rod 1& is hook shaped with the short side of the hookuppermost as indicated by dotted lines. T he upper side of the hook isdisoosed through the upper hole 8 shown in *ig. i and the lower side ormain part of the rod is dis posed through the lower hole 8 shown in 4-.The ribs to of the plate on one face of the corner, are shown extendingfrom points near the lateral side ll of one of the regular studs. bl earthis stud the ribs to are shown held in position byan upright metal stay4) held in position by the tie rod a and another like u out of viewbelow it. The clamp L on a adapts it to hold 0 at different distancesfrom the mold space.

Fig. 5 is a sectional view through a flanged bar M of special shape andhaving a flange which extends between a lateral side R of the supportand the adjacent end of K. K is one of a plurality of plates in the formof boards disposed in a similar manner to K of Fig. 1, but not fastenedtogether in the form of large plates or panels. Each bar like M isadapted to hold the ends of a plurality of boards K in positiondistributed longitudinally of it. The molding face of K is shown havinga recess. Part of the recess acts as a seat bearing against a flange Fof the support. M is held in position as shown by the lock (P engagingthe support. Instead of boards I it is advantageous in some work to usesheet metal plates and secure them in position in the same manner by M.An improved plate for this purpose is shown in Figs. 11 and 12. M isalso shown adjusted to it in Fig. 12. The plate comprises a sheet metalchannel (2 .2). its web .2 provides the face for disposition adjacentthe mold space. Its sides 2 extend outwardly of the mold space andpreferably have flanges e at a substantial distance therefrom. The web 2forms nearly all the molding face of the plate but is cut away at eachend of the plate to form a recess in the molding face. A slight portionof each side 2 is also shown cut away at its end to correspond with thedepth of the recess. The surface within the recess is shown disposedagainst a flange F in the same manner as the surface within the recessin K in Fig. 5. -The recess permits the molding faces of both plate andsupport being in substantially the same plane and forming a more uniformsurface on the concrete. The sides 2 of the channel extend beyond theend of the web a and, at the corners of the plate are bent so that theyform laps .2 which are shown as forming part of the end surface oftheplate. These laps are preferably fastened to 2 by welding but they couldbe riveted to it. The end piece 2* is an angular shaped piece of sheetmetal extending between the sides 2 of the channel and between the web 2and the laps .2 lVithin the said recess, 2 forms the surface which isdisposed against the flange of the support. The flanged bar M and theflange F of the support, are not shown in Fig. 11.

Any suitable rod clamps or nuts may be used on any of the tie rods inany construction shown in this application and in place of any of therod clamps shown herein. In Fig. 8, 0 and p are rod clamps which presenta flat end to the surface which bears against them. They are thereforemore suitable for use against wood members like the ribs to and 202.They have screws adapted to press against opposite sides of a rod. In 0each screw is not directly opposite another. In 39 each screw isdirectly opposite another. This clamp 19 has more pairs of screws likethat shown but they are masked from view by Y. Any of the rods V or Vmay be used with a rod clamp at only one end. In such case there couldbe threads on the other end of the rod for only a short distance and anut thereon. Any long variation could be accommodated by the rod clampand tension could be applied by a few turns of the nut. Instead of beinghook shaped at one end, 20 could be secured to Z in the same manner thatu is secured to the other Z shown. At the other end of a p could bereplaced by a few threads and a nut thereon. In a similar manner'zficould be secured to o by a nut. 24- could also be secured to an endstringer like Z in the same manner shown for a. In such case Y at theright of Fig. 3 would be moved to a greater distance from 1 and an endstringer like Z spliced to its end for connecting with 16 In similarmanner the hook end of u could be straight and threaded a short distanceand a nut thereon hearing against (a 6).

Any of the tie rods .7, V, a, a or u may be replaced by other suitabletension members which are adjustable for holding parts of the mold atdifferent distances apart or at different distances from the mold space.Wire is a satisfactory tension memher for this purpose and may betightened by suitable wire clamps in common use by builders. lVithoutwire clamps two lengths ofwire may be twisted together by a stick in themanner of a tourniquet which has also been a common practice amongbuilders.

. stringers for holding the supports at proper.

welding.

What I claim is 1. A mold comprlsmg a series of supports adjacent themold space, plates between the supports and adjacent the mold space,said supports having lateral openings, locks extending laterally fromthe supports and holding the plates in position, each of said locksbearing against a su port outwardly of the mold and extending literallythrough one of said openings and adapted to bear laterally against thesupport at a point nearer to the mold space than the part or said lockwithin said opening.

2. A mold according to claim 1, a lock thereof having a member disposedlaterally of the support and movable toward and from the mold space,said member being adapted to prevent a plate moving outwardly of themold.

3. A mold according to claim 1, a lock thereof having a screw arrangedlaterally of the support and movable toward and from the mold space, thescrew being adapted to prevent a plate moving outwardly of the mold.

4. A mold comprising a series of supports adjacent to the mold space,plates between the supports, the supports being hollow and havinglateral openings and locks engaging the supports and holding the platesin position, such locks entering the support, having a part extendinglaterally through an opening, and having bearing points within thesupport, the one bearing outwardly of the mold space and the othernearer the mold space than said lateral part and bearing laterallyagainst the support. 7

5. A mold according to claim 4, the locks thereof having each a memberengaging the lateral part of the lock outside the support and adapted tobe tightened to resist pressure from the plate and when so tightened tohold the bearing portions of the lock in engagement with the portions ofthe support against which they bear.

6. A mold comprising a series of supports adjacent the mold space,having longitudinal slots, plates between the supports and adjacent themold space, locks held by the supports and holding the plates inposition,

intervals apart and having bolts which engage said slots in thesupports, each said bolt having its head disposed within a support, thehead of the bolt being longer than its width and adapted to bedisengaged from the support when the length of the head is turnedparallel to the slot in which the bolt is dis osed.

7 mold comprising a series of supports adjacent the mold space, platesbetween the supports and adjacent the mold space, locks held by thesupports and holding the plates in position, stringers for holding thesupports at proper intervals apart, a splice for connecting twostringers end to end, and a bolt for uniting the splice to a stringer,engaging a slot in one of said parts, said slot elongated transverselyof the stringer, and the bolt having a head longer than wide and adaptedto be inserted through such slot, and to be turned transversely thereto.

8. A mold for forming two walls and an inside cornerwhere they meet andcomprising for each wall a frame of studs and stringers, the studs beingon the face of the wall, plates between the studs and adjacent the moldspace, the studs having flanges adjacent the mold space, a flange of thestud on the inside of one of the walls and nearest the corner beingseparated from the nearest stud on the inside of the other wall by asingle intervening facin plate adapted to be altered in width, the rameof studs and stringers on the inside of one said wall being connectedwith the part of the mold for the other said wall by a tension men berdisposed substantially parallel to the stringers in said frame andadjusted in length to correspond with the width of said sition, saidstay being adjustable into positions at different distances from onesaid frame and held at the desired distance from said frame by a tensionmember connecting it thereto.

10. A mold for forming two walls and an outside corner where they meet,and comprising studs adjacent the mold space, plates between the studsand adjacent the mold space, stringers holding the studs at properintervals apart, a corner plate on a face of the outside corner andhaving outside ribs, an upright stay outside of said ribs, and a tensionmember for anchoring said stay adapted to transmit tension to the framefor the inside of the wall which extends transversely to said plate andribs. 7

11. A mold comprising aseries of supports adjacent the mold space,plates between the supports. and adjacent the mold space, locks heldbythe supports and holding the plates in position, a splice forconnecting two supports end to end by bolts substantially parallel tothe length of said support, each said bolt having a head which is longerthan wide and thus adapted to be held in position when disposed with thelength of its head extending transversely of the length of thecorresponding one of said slots.

12. A mold comprising a series of supports adjacent the mold space,plates between the supports and adjacent the mold space, locks held bythe supports and hold the plates in position, a splice connecting twosupports end to end by bolts engaging slots in the outward faces of thesupports, the long dimension of each said slot being disposedsubstantially parallel to the length of a said support, each said bolthaving a head which is longer than wide, means engaging said head forpreventing the head turning when in position, whereby the head is heldextending transversely of the length of the slot which the bolt engages.

13. A moldcomprising a series of supports adjacent the mold space,plates be tween the supports and adjacent the mold space, locks held bythe supports and holdthe plates in position, stringers for holding thesupports at proper intervals apart, asplice for connecting twostringersend to end, a belt for uniting the splice to a stringer,engaging a slot in one of said parts, said slot elon ated transverselyof the stringer, the bolt having a head longer than wide, and adapted tobe inserted through one of said slots, means in contact with said headfor preventing the head turning when in position and with its longerdimenslon disposed transve sely of the length of the en ages.

- which the bolt A. it mold comprising a series of supports aojacent themole space having longitudinal slots, plates between the supports andadjacent the mold space, loci-Is held by the supports and holding theplates in posiion, stringers for holding the supports at properintervals apart and having a bolt which engages a slot in the outwardface of a support, the long dimension of said slot being disposedtransversely of the length of stringer, said bolt having its headdisposed within the support, the head of the bolt being longer thanwide, means engaging said head for preventing the head turning when inposition and whereby the bolt is signed my name.

held with the length of its head extending transversely of the length ofthe slot which the bolt engages.

15. A. mold comprising a series of sup ports adjacent the mold space,plates between the supports and adjacent the mold space, locks held bythe supports and holding the plates in position, stringers for holdingthe supports at proper intervals apart, a stringer having a bearingsurface extending transversely of it, said surface having an openingadapted for receiving a tie rod disposed parallel to said stringer, suchtie rod, and a clamp secured thereto, such clamp engaging said bearingsurface to anchor the tie rod.

16. A mold comprising a series of supports adjacent the mold space,plates between the supports and adjacent the mold space, locks held bythe supports and holding the plates in position, a splice connecting twosupports end to end by bolts engaging slots in the outward faces of thesupports, the long dimension of each said slot being disposedsubstantially parallel to the length of said support, each said bolthaving a head which is longer than wide, means adapted to be insertedwithin the support and engage said head for preventing the head turningwhen in position, whereby the head is held extending transversely of thelength of the slot which the bolt engages.

17. A mold comprising a series of supports adjacent the mold spacehaving longitudinal slots, plates between the supports and adjacent themold space, locks held by the supports and holding the plates inposition, stringers for holding the supports at proper intervals apartand having a bolt which engages a slot in the outward face of a support,the long dimension of said slot being disposed transversely of thelength of a stringer, said bolt having its head disposed within thesupport, the head of the bolt being longer than wide, means adapted tobe inserted within the support and engage said head for preventing thehead turning when in position and whereby the bolt is held with thelength of its head extending transversely of the length of the slotwhich the bolt engages.

In witness whereof, I have hereunto ROWLAND T. ALES.

